Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
what is the grid when the time/retired is 1:46:42.3?

### Inputs:
table_name: table, columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']

### Response:
SELECT SUM Grid FROM table WHERE Time/Retired = 1:46:42.3