Question

3 upon 10 x 7 upon 18 x 3.5

Answer 1

1790.50 upon 3 is the answer

Answer 2

$\frac{3}{10} \times \frac{7}{18} \times 3.5 \\ \frac{1}{10} \times \frac{7}{6} \times \frac{7}{2} \\ \frac{49}{120} \\ 0.408333$
Hope it will help you buddy