<human>:  Each bank teller has 10 rolls of coins. Each roll has 25 coins. How many coins do four bank tellers have in all?
<bot>: How many coins does each bank teller have? ** Each bank teller has 10 x 25 = <<10*25=250>>250 coins.
How many coins do four bank tellers have in all? ** Thus, four bank tellers have 250 x 4 = <<250*4=1000>>1000 coins.
#### 1000