human
Marcy can make 3 spears out of a sapling and 9 spears out of a log. How many spears can she make out of 6 saplings and a log?
assistant
How many spears does Marcy make from the 6 saplings? ** First find the total number of spears she makes from saplings: 3 spears/sapling * 6 saplings = <<3*6=18>>18 spears
How many spears does Marcy make from the 6 saplings and the log? ** Then add the number she makes from the log: 18 spears + 9 spears = <<18+9=27>>27 spears
#### 27