Here is a prefix in use: e.g. A 2·3 kW kettle is connected to the 230 V mains. What current flows through its heating coil? P = I × V So I = P / V I = 2,300 / 230 I = 10 amps 2·3 kW needs changing into 2,300 W. If we had left the power as 2·3, our answer would have been 0.01 A - way too small for a kettle! Whenever you see a prefix in front of a unit, remember to change the number by the correct amount!
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