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

### Instruction:
It is the rainy season in central Texas.  It rained for 7 hours on Monday at a rate of 1 inch per hour.  On Tuesday, it rained for 4 hours at a rate of 2 inches per hour, and on Wednesday, it rained for 2 hours at a rate of twice that of the previous day.  What is the total combined rainfall, in inches, for these three days?

### Response:
On Monday, 7 hours of rain at a rate of 1 inch per hour is 7*1=<<7*1=7>>7 inches of rain.
On Tuesday, 4 hours of rain at a rate of 2 inches per hour is 4*2=<<4*2=8>>8 inches of rain.
On Wednesday, it rained for 2 hours at a rate of 2*2=4 inches per hour.
The total rainfall for Wednesday is 4*2=<<4*2=8>>8 inches.
For all three days, the combined rainfall is 7+8+8=<<7+8+8=23>>23 inches of rain.
#### 23