((1+2+3+4+5+6+7+6+5+4+3+2+1)/(7777777*7777777)).
((1+2+3+4+5+6+7+6+5+4+3+2+1)/(7777777*7777777))．
<gadget id="calculator">1 + 2 + 3 + 4 + 5 + 6 + 7 + 6 + 5 + 4 + 3 + 2 + 1</gadget>
<output>49</output>

<gadget id="calculator">7_777_777 * 7_777_777</gadget>
<output>60_493_815_061_729</output>

<gadget id="calculator">49 / 60_493_815_061_729</gadget>
<output>1/1_234_567_654_321 = around 0</output>

<result>1/1_234_567_654_321 = around 0</result>