We represent 1 whole with a rectangle. Divide it vertically into 7 sections because the denominator of the first fraction is 7.
Again divide the rectangle horizontally into 8 sections because the denominator of the second fraction is 8.
Color any 1 of the vertical sections of the rectangle because the numerator of the first fraction is 1.
Color any 1 of the horizontal sections because the numerator of the second fraction is 1.
The common area of the rectangle, where both the column and the row overlap is encircled. It represents the required product which is showed in figure 4.
Correct Answer is : Figure 4