could someone answer 13? Thank you.!

Answer:
260000cm
Step-by-step explanation:
We know that 1 km = 1000 m
and 100 cm = 1 m
26 km 1000m 100 cm
*-------------- * --------------
1 km 1 m
Notice the units cancel and we are left with cm
26* 1000 * 100 cm
260000cm