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

### Instruction:
Sandro has six times as many daughters as sons. If he currently has three sons, how many children does he have?

### Response:
If Sandro has three sons, the total number of daughters, six times the number of sons, is 3 sons * 6 daughters/son = <<3*6=18>>18 daughters.
In total, Sandro has 3 sons + 18 daughters = <<3+18=21>>21 children
#### 21