To calculate 18 times 5, you can simply multiply the two numbers together. So, 18 multiplied by 5 equals 90.
This means that if you take 18 groups of 5, you will end up with a total of 90. You can also think of it as adding 18 five times: 18 + 18 + 18 + 18 + 18, which also results in 90.
Thus, the answer is 90.