https://mathweb.ru/allsystem.html?id=345093

Умножить 111,001100110011(2) на 100,1(2) = 100000.011001100101100000000000 Столбиком

Введите два числа и укажите их основание системы счиления:

x																	1	1	1	.	0	0	1	1	0	0	1	1	0	0	1	1
x																	1	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
																0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
															0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
														0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
													0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
												0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
											0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
										0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
									0	0	0	0	0	0	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	1	1	0	0	1	1	0	0	1	1	0	0	1	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
				1	1	1	0	0	1	1	0	0	1	1	0	0	1	1
			1	0	0	0	0	0.	0	1	1	0	0	1	1	0	0	1	0	1	1	0	0	0	0	0	0	0	0	0	0	0

Ответ: 111.001100110011₂ * 100.1₂ = 100000.011001100101100000000000₂