The standard mass of a part is 25 grams. If a part with a mass of 26 grams is recorded as +1, then how much should a part with a mass of 23 grams be recorded as.
一种零件的标准质量是25克，如果质量是26克的零件记作+1，那么23克的零件应该记作多少．
<gadget id="calculator">25 - 23</gadget>
<output>2</output>

<result>2</result>