Fill in the same number in the two □ of 7.8*□-5.8*□=10 to make the equation true, how much should be filled in □.
在7.8*□-5.8*□=10的两个□里填入相同的数，使等式成立，□里应填入多少．
<gadget id="calculator">7.8 - 5.8</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>