If you know the power you do not need to calculate it by anything. And if you don't, the answer will depend on what measure you do know!
Multiply the power of the eyepeice by the objective lense
To calculate absorbed power for motors you need to know the current draw, voltage, and power factor. Multiply the three numbers together to get power consumption.
If you multiply kVA by Power Factor (Ranges from zero to one) you get watts which is effective power.
Multiply 1.04 by itself (1.04) 205 times. The answer is about 3,103.37714
You multiply the power by time, ie kW*h
You can either calculate the fraction and raise the result to the 100th power or raise the numerator to the 100th power and divide it by the denominator raised to the 100th power.
To calculate this, write the number as a power of ten, and use the fact that when you raise a power to a power, you simply multiply the exponents. (10^10)100 = 10^20
A number "to the power" of another number means to multiply the first number by itself however many times the second number is. Example: 43, 4 to the power of 3, means multiply 4 by itself 3 times: 4x4x4=64
Either (1) determine the power of each branch, and add them together, or (2) multiply the load current by the supply voltage.
Multiply 2 by itself 2,002 times: 2 x 2 x 2 . . . .
You multiply three by itself three times: 3 x 3 x 3 = 27
To calculate overtime, you multiply 1.5% times your hourly wage. When you get that, you multiply that times your overtime hours worked.