Editing GNU Units (section)

=== Interactive mode ===
<!-- GNU units version 2.10, Windows XP SP3 -->
<pre>
Currency exchange rates from www.timegenie.com on 2014-03-28
2729 units, 92 prefixes, 77 nonlinear units

You have: 10 furlongs
You want: miles
        * 1.25
        / 0.8
You have: 1 gallon + 3 pints
You want: quarts
        * 5.5
        / 0.18181818
You have: sqrt(meter)
                    ^
Unit not a root
You have: sqrt(acre)
You want: ft
        * 208.71033
        / 0.0047913298
You have: 21 btu + 6500 ft lbf
You want: btu
        * 29.352939
        / 0.034068139
You have: _
You want: J
        * 30968.99
        / 3.2290366e-005
You have: 3.277 hr
You want: time
        3 hr + 16 min + 37.2 sec
You have: 1|2 inch
You want: cm
        * 1.27
        / 0.78740157
</pre>

The underscore ('_') is used to indicate the result of the last successful unit conversion.