<human>:  A bag of buttons had 21 buttons in it. Seven buttons had two holes and the rest had four holes. How many holes were in all the buttons in the bag?
<bot>: How many buttons had four holes? ** There were 21 - 7 = <<21-7=14>>14 buttons with four holes.
How many holes did the four-holed buttons have? ** The four-holed buttons had 14 * 4 = <<14*4=56>>56 holes.
How many holes did the two-holed buttons have? ** The two-holed buttons had 7 * 2 = <<7*2=14>>14 holes.
How many holes were in all the buttons in the bag? ** Thus, there were 56 + 14 = <<56+14=70>>70 holes in all the buttons in the bag.
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