On the weekend, Jeff works 3 / 3 = <<3/3=1>>1 hour each day.
On the weekdays, he spends 4 * 3 = <<4*3=12>>12 hours working each day.
Thus, he spends 2 * 1 + 5 * 12 = <<2*1+5*12=62>>62 hours working each week.
#### 62