Every day, Bob logs 10 hours of work in his office. If he works for five days a week, calculate the total number of hours he logs in a month.
In a week, working 10 hours a day, Bob logs 10*5 = <<10*5=50>>50 hours
After a month with 4 weeks, Bob logs 4*50 = <<4*50=200>>200 hours for his office working hours.
#### 200