I need to know the answer I’m having a hard time understanding this

Answer:
area of shaded region = 118 cm²
Step-by-step explanation:
The shaded region (A ) is calculated as
A = area of outer rectangle - area of white rectangle
• area of rectangle = length × width , so
A = 19 × 10 - 9 × 8 = 190 - 72 = 118 cm²