Calculation: 180(1/3)-1(1/4)+2(1/3)-3(1/4)+4(1/3)-5(1/4)+...+178(1/4) 3) -179(1/4).
计算：180(1/3)-1(1/4)+2(1/3)-3(1/4)+4(1/3)-5(1/4)+…+178(1/3)-179(1/4)．
<gadget id="calculator">2 + 180</gadget>
<output>182</output>

<gadget id="calculator">180 / 2</gadget>
<output>90</output>

<gadget id="calculator">182 * 90</gadget>
<output>16_380</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 90</gadget>
<output>30</output>

<gadget id="calculator">1 + 179</gadget>
<output>180</output>

<gadget id="calculator">180 / 2 / 2</gadget>
<output>45</output>

<gadget id="calculator">180 * 45</gadget>
<output>8_100</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 90</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">8_100 + (45/2)</gadget>
<output>16_245/2 = around 8_122.5</output>

<gadget id="calculator">30 - (16_245/2)</gadget>
<output>-16_185/2 = around -8_092.5</output>

<gadget id="calculator">16_380 + (-16_185/2)</gadget>
<output>16_575/2 = around 8_287.5</output>

<result>16_575/2 = around 8_287.5</result>