Give the step-by-step reasoning process and then the final answer. Marlon had 42 lollipops in the beginning. On his way home, he saw Emily and gave her 2/3 of his lollipops. Then, Marlon kept 4 lollipops and gave the rest to Lou. How many lollipops did Lou receive?
Marlon gave Emily 42 x 2 / 3 = 28 lollipops. So, he only had 42 - 28 = 14 lollipops left. After keeping 4, Marlon gave 14 - 4 = 10 lollipops to Lou.
The final answer: 10.