Calculation: 7.81*49-78.1*3.8+0.781*90=how much.
计算：7.81*49-78.1*3.8+0.781*90=多少．
<gadget id="calculator">7.81 * 49</gadget>
<output>382.69</output>

<gadget id="calculator">78.1 * 3.8</gadget>
<output>296.78</output>

<gadget id="calculator">382.69 - 296.78</gadget>
<output>85.91</output>

<gadget id="calculator">0.781 * 90</gadget>
<output>70.29</output>

<gadget id="calculator">85.91 + 70.29</gadget>
<output>156.2</output>

<result>156.2</result>