4 men can do one work in 8 days. How many men can do the half work in 2 days?

Question: 4 men can do one work in 8 days. How many men can do the half work in 2 days?

Solution:
From the first part of the question, we get - 4 men can do one work in 8 days.
here,
men, M₁ = 4,
work, W₁ = 1,
day, D₁ = 8.

From the second part of the question, we get - How many men can do the half work in 2 days?
here,
men, M₂ =?
work, W₂ = 1/2,
day, D = 2.

we know,
M₁ × W₂ × D₁ = M₂ × W₁ × D₂
M₂ = (M₁ × W₂ × D₁) / (W₁ × D₂)
= {4 × (1/2) × 8}/ (1 × 2)
= 16/2
= 8 men