What is the quotient of 4.2 divided by 0.5 minus 5.1?
4.2除以0.5的商减去5.1差是多少？
<gadget id="calculator">4.2 / 0.5</gadget>
<output>8.4</output>

<gadget id="calculator">8.4 - 5.1</gadget>
<output>3.3</output>

<result>3.3</result>