Here's how to figure that out:

* Sun's diameter: 1.392 million kilometers (865,000 miles)

* Jupiter's diameter: 142,984 kilometers (88,846 miles)

Calculation:

* Divide the Sun's diameter by Jupiter's diameter: 1,392,000 km / 142,984 km ≈ 9.73

This means you could fit about 9.73 Jupiters across the Sun's diameter. Since you can't fit parts of planets, we round down to the nearest whole number, which is 10.