Find Value of ? in the Following Grid

7 3 6 2 2 8 5 4 1 1 2 4 4 2 1 ?

4 is the missing number. The logic is each column add to 14

Each column sums up to 14. 7+2+1+4 = 14 3+8+1+2 = 14 6+5+2+1 = 14 2+4+4+x=14; hence x=4

When you add the numbers vertically, you get 14 in each column. So same logic applicable to the last column. 2+4+4+x=14 Therefore, x=4

Find the value of ? in the following grid?

4 5 6 8 2 3 5 4 3 2 3 2 109 59 ? 158

Top cell is multiply and Bottom cell is sum of mid cell's number.