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If 8 x 7 =3540, 5 x4 =2025 then 7 x 9 =?

If 8 x 7 =3540, 5 x4 =2025 then 7 x 9 =?

Explanation

8x7=3540

8x5 =40

7x5=35

answer = 3540

so same way

7x5 =35

9x5=45

4535