<human>:  Sidney does 20 jumping jacks on Monday, 36 on Tuesday, 40 on Wednesday, and 50 on Thursday. Brooke does three times as many jumping jacks as Sidney. How many jumping jacks did Brooke do?
<bot>: How many jumping jacks did Sidney do? ** Sidney does 20 on Monday + 36 on Tuesday + 40 on Wednesday + 50 on Thursday = <<20+36+40+50=146>>146 jumping jacks.
How many jumping jacks did Brooke do? ** Brooke does 3 x 146 = <<3*146=438>>438 jumping jacks.
#### 438