Final answer:
To find out how many coins Leonard has in total, multiply the number of coins from each decade by the number of decades he has been collecting. Leonard has approximately 656 coins in total.
Step-by-step explanation:
To find out how many coins Leonard has in total, we need to multiply the number of coins from each decade by the number of decades he has been collecting. Since he has 164 coins from each of the 4 decades, we can calculate the total as follows:
Multiply the number of coins from each decade by the number of decades: 164 coins/decade x 4 decades = 656 coins
Therefore, Leonard has approximately 656 coins in total.