<human>:  Bob orders a pizza with 8 slices. He eats half of it and each slice was 300 calories. How many calories did he eat?
<bot>: How many slices did Bob eat? ** He ate 8/2=<<8/2=4>>4 slices
How many calories did Bob eat? ** So he ate 4*300=<<4*300=1200>>1200 calories
#### 1200