In the following formula, what is the number closest to 1?
下面的算式中，得数最接近1的是多少
<gadget id="calculator">1.4 + 0.5</gadget>
<output>1.9</output>

<gadget id="calculator">1.9 - 1</gadget>
<output>0.9</output>

<result>0.9</result>