a's type = integer
b's type = integer
a=10
b=3
a+b=13
a-b=30
a/b=3.33333333333
a%b=1

---

a's type = double
b's type = double
a=10.5
b=3.3
a+b=13.8
a-b=34.65
a/b=3.18181818182
a%b=1

---

a's type = double
b's type = integer
a=10.5
b=3
a+b=13.5
a-b=31.5
a/b=3.5
a%b=1

---