Will a 7.2-megapixel photo printed as 14 inch be blurred? What should I do?

1. The above picture is only 670 * 504 = 337680 pixels. . Less than 340 thousand pixels?

2. 14 inch photo size is 25*35cm. According to the resolution of 300, the pixel is 4134 * 2953 =12.2 million pixels?

Calculate 2480 *1772 = 4.4 million pixels according to the resolution of 180?

3. In theory, 7 million pixels can print 14 inch photos. . But if it is DC, the picture quality is generally poor. ?

The SLR is a little better. .