Calculating four times 1.8

To calculate four times 1.8, you begin with the number represented by 1.8 and multiply it by 4. Multiplying by 4 means you are essentially adding 1.8 to itself four times, combining it repeatedly to reach the total. Using the expression (1.8 * 4) clearly shows this multiplication step. Here, 1.8 is your starting number, and multiplying it by 4 yields the value 7.2. Understanding this process helps to grasp how multiplying any number by 4 increases its value exactly fourfold, which is the essence of calculating four times 1.8.