Quietly, Wangwang, Er'er, and Ruarui jumped rope together, and tuned 59, 79, 52, and 68 ropes respectively. How many ropes did they jump on average?
悄悄、旺旺、尔尔、瑞瑞四人一起跳绳，分别调了59、79、52、68个，他们平均跳了多少个．
<gadget id="calculator">59 + 79 + 52 + 68</gadget>
<output>258</output>

<gadget id="calculator">258 / 4</gadget>
<output>129/2 = around 64.5</output>

<result>129/2 = around 64.5</result>