1. Let \( x \) be the income Mr. Shaw tithed on.
2. Set up the equation for the tithe as one-tenth of the income:
    \frac{1}{10} \cdot x = 213 
3. Solve for \( x \) by multiplying both sides by 10:
    x = 213 \times 10 
4. Calculate the result:
    x = 2130 
Mr. Shaw tithed on an income of  2130 .