Eight times.
If: 40y = 320 Then: y = 8
8 * 40 = 320
40 x 8=320
64 times 5 equals 320.
8 x 320 = 2560
80 x 4 = 320
10
To find 8 x 320, you can break down 320 into 300 + 20. Since you know that 8 x 300 equals 2400, you can calculate 8 x 20, which equals 160. Finally, add 2400 and 160 to get the result of 8 x 320, which is 2560.
32*20 320*2 8*80 160*4 10*64
you can find that by knowing the basics for example 32X8=256 so you just add a 0!
320