Simple calculation: 9 / 5-19 / 10-19 / 3 * 3

Simple calculation: 9 / 5-19 / 10-19 / 3 * 3

9/5-10/19-3*3/19
= 9/5-(10/19+9/19)
= 9/5-19/19
= 9/5-1
= 4/5