Solomon bought 20 marbles from his friend Johanna and added them to a store that had 50. If his father also gave him 2/5 times as many marbles as he bought from Johanna, and each marble weighs 2kgs, calculate the total weight of marbles Solomon has in the store.
After buying twenty marbles from his friend Johanna, Solomon had 20+50 = 
<gadget id="calculator">20+50</gadget>
<output>70</output>
70 marbles.
Solomon's father gave him 2/5*20 = 
<gadget id="calculator">2/5*20</gadget>
<output>8</output>
8 more marbles.
Adding Johanna's and Solomon's marbles, he has a total of 8+70 = 
<gadget id="calculator">8+70</gadget>
<output>78</output>
78 marbles.
If each marble weigh 2 kgs, the total weight of marbles Solomon has in store is 78 * 2 kgs = 
<gadget id="calculator">78*2</gadget>
<output>156</output>
156 kgs.

<result>156</result>