<b>Physical data with a precise number of significative digits.</b>
(name: <span class="tt">sigunits</span>)<br>
This is a text input to be compared with a given correct answer,
the syntax is <number> [<physical unit>]
[#<desired number of significative digits>]
[,<desired physical unit for the display>]
<p>
example:
<ul>
<li><b>1m#3</b> means 1 meter with 3 significant digits. Synonyms:
<i>1.00m</i>, <i>0.00100 km</i>.</li>
<li><b>100.0 N</b> has the same meaning than <i>1e2N#3</i>: 100 newtons
with 3 significative numbers.</li>
<li><b>0.50A.h</b> would give "1.8e+02 C" when displaied. Use <b>0.50A.h</b>
to get "5.0e-01 A.h".
</ul>