Question

If in a coded language
1.67 * 2.31 = 129
2.39 * 4.31 = 202
6.78 * 4.87 = 816
Then
7.16 * 9.13 = ?

Answer 1

Firstly let us do some verification, as follows:
1.67* 2.31 = 129 (1 * 67) + (2* 31) = 67 + 62 = 129
2.39* 4.31 = 202 (2 * 39) + (4 * 31)= 78 + 124 = 202
6.78 * 4.87= 816 (6 * 78) + (4 * 87)= 468 + 348=816
then,
7.16 * 9.13 =? (7 * 16) + (9 *13) = 112 + 117 = 229
The solution is 229

Answer 2

we will have
7.16 * 9.13 = 7*16+9*13=112+117=229

Answer 3

If we:

Suppose that the numbers' decimal points are the multiplication sign
(✕) and the middle figure of the multiplications must be an addition
sign (+),

then we could conclude the following:

1 ✕ 67 + 2 ✕ 31 = 129

2 ✕ 39 + 4 ✕ 31 = 202

6 ✕ 78 + 4 ✕ 87 = 816

Hence,

7 ✕ 16 + 9 ✕ 13 = 229