Solution: Suppose that X pieces were originally produced every day, and Y days were produced after speeding up. It took z days to produce 300 tents.

Set the following equation:

XY=300

1.5X×Y= 1500-300

y+Z+4 = 1500 \x

X= 100, Y=8 and Z=3 are obtained.

300÷3= 100 (on)

A: We used to handle 100 tents every day.