Ao Zebra, Koizumi and Ou Ou went to Taoyuan to pick peaches. Ou Zebra said: "I picked 3 more peaches than the sum of the two of you." Ou Ou went on to say: "Yes, you picked 15 more peaches than me, but I picked 15 more peaches than Koizumi." How many peaches did the person pick in total?
奥斑马、小泉、欧欧三人去桃园摘桃子．奥斑马说："我比你们俩摘的桃子总和还多3个．"欧欧接着说："是啊，你比我多摘15个，但我比小泉多摘15个．"那么，他们三人一共摘了桃子多少个．
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">15 + 12</gadget>
<output>27</output>

<gadget id="calculator">12 + 27 + 3</gadget>
<output>42</output>

<gadget id="calculator">12 + 27 + 42</gadget>
<output>81</output>

<result>81</result>