As an example this is the value 301070262315659265.
you can write basic js program and alert it , the value will be round to:301070262315659260
<p id="demo">This is a paragraph.</p>
Build an object to work with big Integers (or take the source) like on this page ...
The question was how to pass from 2012 to 2013 with two operands : the cube and the square root (with floor rounding).
This page calculates and display the 81 solutions (all with 31 operations) I found with C++...
Two solutions are remarkable : n°12 with at most 423 decimal digits (*) ! n° 33 with only 18 decimal digits !
(*) Bigger than the Number.MAX_VALUE = 1.7976931348623157e+308 !