Grandma Wang’s house has 6 stools. I asked a painter to paint them twice. Each stool needs to be painted for 2 minutes each time, but I have to wait 10 minutes before I can paint the second time. How much does it cost to finish painting 6 stools? minute.
王奶奶家有6张凳子，请油漆师傅来刷油漆，总共要刷两次，每张凳子每一次要刷2分钟，但必需等10分钟后才能刷第二次，刷完6张凳子要多少分钟．
<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>