A batch of wood, if used to make tables, can be made into 40 pieces, if used to make stools, it can be made into 60 pieces. If a table and a stool are assembled into a set of tables and stools, how many sets of tables and stools can be made from this batch of wood?
一批木材，如果用来做桌子可做40张，如果用来做凳子可做60把．如果将一张桌子和一把凳子组装成一套桌凳，这批木材可做多少套桌凳？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/40) + (1/60)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">1 / (1/24)</gadget>
<output>24</output>

<result>24</result>