Convert

metres|sqm=square metre|square metres  Use in the following matter:   Rounding: The number given for rounding rounds off the result to the power of 1/10 the rounding number. For instance, if the result is 8621 and the round number is '-2', the result will be 8700. If the result is '234.0283043' and the round number is '0', the result will be 234.