10, 15, 18, 25, 32, 32, 48, 57, what is the average number in this group of data.
10，15，18，25，32，32，48，57这组数据的中，平均数是多少．
<gadget id="calculator">10 + 15 + 18 + 25 + 32 + 32 + 48 + 57</gadget>
<output>237</output>

<gadget id="calculator">237 / 8</gadget>
<output>237/8 = around 29.625</output>

<result>237/8 = around 29.625</result>