need simple software for dimension

[rsrsrs]

need simple software for dimension
should be little more comfortable like Xara,

ideally like CorelDraw X6 but less expensive.
dont wann pay 600€ for just one function.

i need
scaling
rounding, no need for 125,25cm (not possible in Xara, right?)
possibilty for small 20cm in same size (see picture :-)