What is the difference between 8.4 minus the sum of 3.44 and 1.56 (3/10)?
8.4减去3.44与1.56和的(3/10)，差是多少？
<gadget id="calculator">3.44 + 1.56</gadget>
<output>5</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">5 * (3/10)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">8.4 - (3/2)</gadget>
<output>6.9</output>

<result>6.9</result>