30*((1/15)+(1/35)+(1/63)+(1/99)+(1/143)+(1/195))
30*((1/15)+(1/35)+(1/63)+(1/99)+(1/143)+(1/195))
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 35</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">1 / 63</gadget>
<output>1/63 = around 0.015873</output>

<gadget id="calculator">1 / 99</gadget>
<output>1/99 = around 0.010101</output>

<gadget id="calculator">1 / 143</gadget>
<output>1/143 = around 0.006993</output>

<gadget id="calculator">1 / 195</gadget>
<output>1/195 = around 0.005128</output>

<gadget id="calculator">(1/15) + (1/35) + (1/63) + (1/99) + (1/143) + (1/195)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">30 * (2/15)</gadget>
<output>4</output>

<result>4</result>