What is 1 35 x 2 12?

To multiply the mixed numbers (1 \frac{3}{5}) and (2 \frac{1}{2}), first convert them to improper fractions. (1 \frac{3}{5} = \frac{8}{5}) and (2 \frac{1}{2} = \frac{5}{2}). Now multiply the fractions: (\frac{8}{5} \times \frac{5}{2} = \frac{40}{10} = 4). Therefore, (1 \frac{3}{5} \times 2 \frac{1}{2} = 4).