Yes it did, but it was more like this: 1234567890 * 11 1234567890 1 2345678900 + shifts, adds, carries in the same register, and caries into

Yes it did, but it was more like this: 1234567890 * 11 1234567890 1 2345678900 + shifts, adds, carries in the same register, and caries into another register. The fewer digits, the faster it took.