Long multiplication is a method used to solve multiplication problems with large numbers. One thing that can really help you in long multiplication is if you know . How to Do Long Multiplication. Long multiplication can seem very intimidating, especially if you're multiplying two numbers that are pretty large. If you take it step . But we can do better! When we multiply 612 × 20 we only need to multiply 612 × 2 and place the result one column over (so it is the same as multiplying by 20). Multiplication calculator shows steps so you can see long multiplication work. Enter multiplicand and multiplier to get product and see how to do long . Long multiplication is the method of multiplication that is commonly taught to elementary school students throughout the world. It can be used on two numbers of . Long multiplication extends tables work so that numbers bigger than 10 can be multiplied without using a calculator. There are a number of ways to do this. Long multiplication is intimidating, especially when you multiply large numbers. Here are two easy ways to do long multiplication. Sal shows lots of examples for how to multiply 2- and 3-digit numbers using 'standard algorithm'. . Why do .