Answer:
1610
Step-by-step explanation:
23.4 is close to 23, 13.9 is close to 14, and 0.18 is close to 0.2 (or 1/5).
23*14 would be equal to 322, and divided by 1/5 is the same as multiplying by 5 which would be 1610.
So the estimated value could be 1610
