Master Zhang is going to buy some tables and chairs with a sum of money. If you only buy tables with this money, you can buy 60 sets, and if you only buy chairs, you can buy 400 sets. How many sets of tables and chairs can you buy with this money? (A table and chair set consists of a table and 10 chairs)
张师傅准备用一笔钱买一些桌子和椅子，这笔钱如果只买桌子能买60张，如果只买椅子能买400把，请问这笔钱能买多少套桌椅？(一套桌椅由一张桌子和10把椅子组成)
<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">1 / 400</gadget>
<output>1/400 = around 0.0025</output>

<gadget id="calculator">(1/400) * 10</gadget>
<output>1/40 = around 0.025</output>

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

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

<result>24</result>