(1/52)+(47/(52*51))+((47*46)/(52*51*50))+((47*46*45)/(52*51*50*49) )+...+((47*46*45...*2*1)/(52*51*50*49...*6*5)).
(1/52)+(47/(52*51))+((47*46)/(52*51*50))+((47*46*45)/(52*51*50*49))+…+((47*46*45…*2*1)/(52*51*50*49…*6*5))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 4_849_505_152</gadget>
<output>4_849_505_152/5 = around 969_901_030.4</output>

<gadget id="calculator">(4_849_505_152/5) / 4_849_505_152</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>