Answer

In Jain practice, 1 Attham usually means doing 3 Upvas continuously.

So, in terms of Vanditu Sutra recitation:

• 1 Upvas = 1 Vanditu Sutra
• 1 Attham = 3 Upvas

Therefore:

1 Attham = 3 Vanditu Sutra

Explanation

When someone says they have done Attham Tap, it means they have observed fasting for three consecutive days. Since Vanditu Sutra is commonly counted per Upvas, 3 Upvas are counted as 3 Vanditu Sutra.

Takeaway

1 Attham = 3 Upvas = 3 Vanditu Sutra.