<human>:  Greg is riding his bike around town and notices that each block he rides, his wheels rotate 200 times. He's now on a a trail and wants to make sure he rides at least 8 blocks. His wheels have already rotated 600 times, how many more times do they need to rotate to reach his goal?
<bot>: How many times do the wheels need to rotate? ** They need to rotate 1,600 times because 8 x 200 = <<8*200=1600>>1,600
How many more times do the wheels need to rotate? ** They need to rotate 1,000 more times because 1,600 - 600 = <<1600-600=1000>>1,000
#### 1000