Someone goes from A to B, the first day is (3/17), the second day is (8/51), the third day is (1/3), and How much of the whole journey is left?
某人从甲地到乙地，第一天走了全程的是(3/17)，第二天走了全程的(8/51)，第三天走了全程的(1/3)，还剩全程的几分之几没走？
<gadget id="calculator">3 / 17</gadget>
<output>3/17 = around 0.176471</output>

<gadget id="calculator">8 / 51</gadget>
<output>8/51 = around 0.156863</output>

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

<gadget id="calculator">1 - (3/17) - (8/51) - (1/3)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>