Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
One-fourth of the airing time of a television program is spent on commercials. If there are 6 thirty-minute programs, how many minutes are spent on commercials for the whole duration of the 6 programs?

### Response:
There are 6*30=<<6*30=180>>180 minutes in the programs.
Commercials are 1/4*180=<<1/4*180=45>>45 minutes.
#### 45