There was a woman washing dishes by the river. When others saw her, they asked her why she used so many bowls. She replied that many guests came to the house, and they shared a vegetable bowl for every two people, a soup bowl for every three people, and a rice bowl for every four people, and shared 65 bowls. How many guests came to her house? ?
有一位妇女在河边洗碗，旁人看见以后问她为什么要用这么多碗？她回答说，家中来了许多客人，他们每两人合用一只菜碗，每3人合用一只汤碗，每4人合用一只饭碗，共用了65只碗，她家究竟来了多少客人？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) + (1/3) + (1/4)</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">65 / (13/12)</gadget>
<output>60</output>

<result>60</result>