What is the quotient of 1.8 divided by 2 minus 1.6?
1.8除以2减1.6的差，商是多少？
<gadget id="calculator">2 - 1.6</gadget>
<output>0.4</output>

<gadget id="calculator">1.8 / 0.4</gadget>
<output>4.5</output>

<result>4.5</result>