To find out how many pencils Mieko has, we can first determine how many pencils she has based on Holden's amount.
Holden has 8 pencils, and Mieko has 4 times as many:
\[ p = 4 \times 8 = 32 \]
So, Mieko has 32 pencils.
Now we can complete the comparison sentence.
p is 4 times 8.
So the completed sentence would be:
p is 4 * 8 (overall comparing).