Move the decimal point of 2.15 three places to the right, and then four places to the left.
把2.15的小数点先向右移动三位，再向左移动四位，这个数就多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>