To find out how many pencils Mieko has, you can use the information given:
Holden has 8 pencils, and Mieko has 4 times as many. So, the calculation for Mieko's pencils (p) would be:
\[ p = 4 \times 8 \]
Calculating that gives:
\[ p = 32 \]
Now you can fill in the comparison sentence:
p is 4 times 8.
So the completed sentence is:
p is 4 times 8.