Answer:
3 * 8 = 42, divide that by 38, then put it inside the cool looking v sign, and that will give you 89 weed leaves left as trim. Take the 21 add that with the divisor of the previous problem, then you get 25 PLUS the breadsticks, and you get 96. Last step is 96 - 29 = how much bud is left to smoke!
Hope this helped!