...first two figures are the value and the third is a multiplier...
So my logic went 221 - that's 22 pf multiplied by 1 - and should be 22pf. 220 didn't make much sense as that should work out to zero.
The first two numbers are the actual number and the third is the number of zeros you add. So for 221, you have 22 plus one zero, so 220. For 220, it's 22 plus zero zeros, so just 22.
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