Verified answer

(1.8 × 10^−3) / (6.0 × 10^−15)

(1.8/6.0) x (10^-3 / 10^-15)

0.3 x 10^(-3+15)

0.3 x 10^12

= 3 x 10^11

(1.8 * 10^(-3)) / (6 * 10^(-15)) =>

(1.8 / 6) * (10^15 / 10^3) =>

(0.3) * 10^12 =>

3 * 10^(-1) * 10^(12) =>

3 * 10^11

3.0 x 10^11