Quickly finding the quintuple of -78

To quickly find the quintuple of -78, you multiply -78 by 5. This operation means you are taking the original number -78 and increasing it fivefold. Multiplying by 5 is the same as adding -78 to itself five times, which simplifies the calculation and gives the total amount in just one step. When you calculate -390 by multiplying -78 by 5, you receive the quintuple of -78. This approach is efficient and applies to any number you choose for -78. For example, if -78 were 7, then 7 multiplied by 5 would give -390 as 35. This method allows you to quickly find five times any number using simple multiplication.