((100-9.1)*0.5+9.45)/27.45.
((100-9.1)*0.5+9.45)/27.45．
<gadget id="calculator">100 - 9.1</gadget>
<output>90.9</output>

<gadget id="calculator">90.9 * 0.5</gadget>
<output>45.45</output>

<gadget id="calculator">45.45 + 9.45</gadget>
<output>54.9</output>

<gadget id="calculator">54.9 / 27.45</gadget>
<output>2</output>

<result>2</result>