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# lunch
subtotal = 42
**tax** = 8.5% of subtotal
_tip_ = 20% of subtotal
++due++ = subtotal + tax + tip
# convert
100 km in miles
32 f in c
$50 in eur
6 ft + 2 in as cm
# dates
today + 3 weeks
2 hours + 45 minutes as minutes
# triangle
a = 3
b = 4
sqrt(a^2 + b^2)
# groceries
milk = 3.49
bread = 2.80
eggs = 4.15
sum