Calculate the number of significant figures up to which the following results will be expressed:
(i) `(2.36 xx 0.07251)/2.130`
(ii) `((28.2 - 21.2)(1.79 xx 10^(6)))/1.62`

Explanation

To solve the problem of calculating the number of significant figures for the given expressions, we will follow a systematic approach for each part of the question.

### Part (i): \((2.36 \times 0.07251) / 2.130\)

1. **Identify Significant Figures in Each Number:**
- **2.36**: This number has 3 significant figures.
- **0.07251**: This number has 4 significant figures (the leading zeros are not significant).
- **2.130**: This number has 4 significant figures (the trailing zero is significant because it is in the decimal portion).
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