<human>:  Jenna is hemming her prom dress. The dress's hem is 3 feet long. Each stitch Jenna makes is 1/4 inch long. If Jenna makes 24 stitches per minute, how many minutes does it take Jenna to hem her dress?
<bot>: How many inches is the hem? ** First find how many inches the hem is by multiplying the length in feet by the number of inches per foot: 3 feet * 12 inches/foot = <<3*12=36>>36 inches
How many stitches does Jenna make? ** Then divide the length in inches by the length of each stitch to find how many stitches Jenna makes: 36 inches / .25 inches = <<36/.25=144>>144 stitches
How many minutes does it take Jenna to hem her dress? ** Then divide the number of stitches by Jenna's stitching rate to find how long it takes her: 144 stitches / 24 stitches/minute = <<144/24=6>>6 minutes
#### 6