Calculate with a simple method: 105*((1/7)+(1/5)+(1/3))
用简便方法计算：105*((1/7)+(1/5)+(1/3))
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/7) + (1/5) + (1/3)</gadget>
<output>71/105 = around 0.67619</output>

<gadget id="calculator">105 * (71/105)</gadget>
<output>71</output>

<result>71</result>