Answer/step-by-step explanation:
Well, we know that 50 x 4 = 200.
We also know that 4 x 100 = 400, and 50 x 10 = 500.
Therefore, in order to find the answer to 500 x 400, we need to multiply 200 by 1000, or 100 x 10.
200 x 1000 = 200,000
Therefore, 500 x 400 = 200,000.
Hope this helps! :D