https://decimal-to-binary.com/multiplication-column.html?id=43

Multiply 100000000000 on 1000000000000000000000000000000 = 100000000000000000000000000000000000000000 Column

Enter two numbers: the first multiplier and the second multiplier.

multiply by

x																																1	0	0	0	0	0	0	0	0	0	0	0
x													1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
+																																0	0	0	0	0	0	0	0	0	0	0	0
																															0	0	0	0	0	0	0	0	0	0	0	0
																														0	0	0	0	0	0	0	0	0	0	0	0
																													0	0	0	0	0	0	0	0	0	0	0	0
																												0	0	0	0	0	0	0	0	0	0	0	0
																											0	0	0	0	0	0	0	0	0	0	0	0
																										0	0	0	0	0	0	0	0	0	0	0	0
																									0	0	0	0	0	0	0	0	0	0	0	0
																								0	0	0	0	0	0	0	0	0	0	0	0
																							0	0	0	0	0	0	0	0	0	0	0	0
																						0	0	0	0	0	0	0	0	0	0	0	0
																					0	0	0	0	0	0	0	0	0	0	0	0
																				0	0	0	0	0	0	0	0	0	0	0	0
																			0	0	0	0	0	0	0	0	0	0	0	0
																		0	0	0	0	0	0	0	0	0	0	0	0
																	0	0	0	0	0	0	0	0	0	0	0	0
																0	0	0	0	0	0	0	0	0	0	0	0
															0	0	0	0	0	0	0	0	0	0	0	0
														0	0	0	0	0	0	0	0	0	0	0	0
													0	0	0	0	0	0	0	0	0	0	0	0
												0	0	0	0	0	0	0	0	0	0	0	0
											0	0	0	0	0	0	0	0	0	0	0	0
										0	0	0	0	0	0	0	0	0	0	0	0
									0	0	0	0	0	0	0	0	0	0	0	0
								0	0	0	0	0	0	0	0	0	0	0	0
							0	0	0	0	0	0	0	0	0	0	0	0
						0	0	0	0	0	0	0	0	0	0	0	0
					0	0	0	0	0	0	0	0	0	0	0	0
				0	0	0	0	0	0	0	0	0	0	0	0
			0	0	0	0	0	0	0	0	0	0	0	0
		1	0	0	0	0	0	0	0	0	0	0	0
		1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

answer:100000000000×1000000000000000000000000000000 = 100000000000000000000000000000000000000000