93, 89, 89, 90, 90, what is their average.
93，89，89，90，90，他们的平均数是多少．
<gadget id="calculator">93 + 89 + 89 + 90 + 90</gadget>
<output>451</output>

<gadget id="calculator">451 / 5</gadget>
<output>451/5 = around 90.2</output>

<result>451/5 = around 90.2</result>