How to obtain the multiplication of the rows.

[NYCrealist123]

I have to program in an Array the multiplication of the rows 0 and 1, how would i go about it?


123
456
789

[kbw]

You could start by asking a clear question.

[Acr]

3 * 456:

Get the last number from the first row, and the last number of the second row. Multiply:
int m22 = 3*6 = 18

Get the last number from the first row, and the center number of the second row * 10. Multiply:
int m21 = 3*5 * 10 = 150

Get the last number from the first row, and the first number of the second row * 100. Multiply:
int m20 = 3*4 * 100 = 1200

summ2 = m22 + m21 + m20 = 1368

20 * 456:

Get the center number from the first row * 10, and the last number of the second row. Multiply:
int m12 = 2 * 10 * 6 = 120

Etcetera

(In this example I used variables where the numbers represent the position in the array)